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"Schizomus crassicaudaius, one of the Tartarid Pedipalpi. Ventral view of a female with the appendages cut short near the base. a, Prosternum of prosoma. b, Metasternum of prosoma. prae-gen, The prae-genital somite. I opisth, First somite of the opisthosoma. II opisth, Eleventh somite of the opisthosoma. pa, Post-anal lobe of the female." — The Encyclopedia Britannica, 1910

Schizomus

"Schizomus crassicaudaius, one of the Tartarid Pedipalpi. Ventral view of a female with the appendages…

"Schizomus crassicaudatus, one of the Pedipalpi. Lateral view of a male, II to VI, the prosomatic appendages, the first being concealed; 5, the fifth, and II, the eleventh tergites of the opisthosoma; pa, the conical post-anal lobe." — The Encyclopedia Britannica, 1910

Schizomus

"Schizomus crassicaudatus, one of the Pedipalpi. Lateral view of a male, II to VI, the prosomatic appendages,…

Scorpions are characterized by having a distinctly segmented abdomen, which passes into the cephalothorax, without any well-marked line of boundary.

Scorpion

Scorpions are characterized by having a distinctly segmented abdomen, which passes into the cephalothorax,…

"Diagram of structure of Scopionidae (most of the appendages removed). IV. to XX., fourth to twentieth somite; IV., basis of the pedipalpi or great claws; V., VI., of two succeeding cephalic segments; T, telson of sting; a, mouth; b, alimentary canal; c, anus; d, heart; e, a pulmonary sac; f, line of ventral ganglionated cord; g, cerebroganglia." -Whitney, 1911

Scorpion Diagram

"Diagram of structure of Scopionidae (most of the appendages removed). IV. to XX., fourth to twentieth…

"Thelyphonus, one of the Pedipalpi. A, Ventral view. I, Chelicera (detached). II, Chelae. III, Palpiform limb. IV to VI, The walking legs. stc, Sterno-coxal process (gnathobase) of the chelae. st1, Anterior sternal plate of the prosoma. st2, Posterior sternal plate of the prosoma. pregen, Position of the pracgenital somite (not seen). l, l, Position of the two pulmonary sacs of the right side. 1 to 11, Somites of the opisthosoma (mesosoma plus metasoma). msg, Stigmata of the tergosternal muscles. an, Anus. B, Dorsal view of the opisthosoma of the same. pregen, The prae-genital somite. p, The tergal stigmata of the tergo-sternal muscles. paf, Post-anal segmented filament corresponding to the post-anal spine of Limulus." — The Encyclopedia Britannica, 1910

Thelyphonus

"Thelyphonus, one of the Pedipalpi. A, Ventral view. I, Chelicera (detached). II, Chelae. III, Palpiform…